Day 11: Add C solution

11/input.txt

@@ -0,0 +1,10 @@
+7777838353
+2217272478
+3355318645
+2242618113
+7182468666
+5441641111
+4773862364
+5717125521
+7542127721
+4576678341

11/solution.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+                              char*O=NULL;typedef
+                        size_t S;typedef unsigned char
+                    U ;S n=0;void V(){S x,y;U*B=malloc(n*
+                   n  *3);printf("P6\n%lu %lu\n255\n",n,n);
+                #pragma  /* passing any cmd line argument */\
+           omp parallel /* will enable netpbm stream output */  for
+         for(y=0;y  <n;y++){for(x=0;x<n;x++){float v=((O[y*n+x] ==0?12
+         :O[y*n+x] )*0.75)/10.0;U*b=B+y*n*3+x*3;*b++=250*v/3;*b ++=255*
+          v;*b++=        240  * v/2;}} fwrite(B ,n*n*3,1,    stdout);
+           free(B )     ;}extern  int I(S j,S**q); int       main(int
+                  h,   char**){char*B;S x,y=0,f=0,F=0,*Q   =
+               NULL,*q;for(; scanf("%ms",&B )==1;y++){if(!n){n
+     =strlen(B);O=malloc(n*n );Q=malloc(n*n*5*sizeof(S));}for(
+  x=0;x<n;x++)O[y*n+x]=B[x]-'0';free(B);}for(y=0;f<n*n;y++){
+ #pragma /* build w/ pgo + openmp for speed */ omp parallel for
+    for(x=0;x<n*n;x++)O[x]++;f=0;q=Q;for(x=0;x<n*n;x++)f+=I(x,
+  &   q);while(q>Q){S p=*(q-1);f+=I(p,&q);q--;}F+=f;if(h>1)V(O,
+        n);else{if(y&&y%100==0)puts("");printf("\033[KStep %lu: "
+       "%lu Flashes\n\033[F",y+1,F);}}puts("");free(O);free(Q);}
+     inline   int I(   S j,S**q){if(O[j]>9){int x,y,X=(j%n!=n-1),
+    Y=(j/     n!=n-1);   O[j]=0;for(y=-     (j/n!=0);y<=Y;y++){
+              for(x=-(j%  n!=0);x<=X    ;x  ++){S e=y*n+x+j;if
+     (O                   [e]){O[e   ]++;*(*q  )++=e;}}}*(*q
+                         )++=j;        return  1;}return
+                                            0     ;}